diff --git a/requirements.txt b/requirements.txt
index 1b77b1b3..604406ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -72,7 +72,7 @@ setuptools-scm==9.2.2
     # via libsemigroups_pybind11 (pyproject.toml::build-system.requires)
 snowballstemmer==3.0.1
     # via sphinx
-soupsieve==2.8
+soupsieve==2.8.4
     # via beautifulsoup4
 sphinx==8.2.3 ; python_version > "3.10"
     # via